Helmholtz instability in stratified shear flows with magnetic fields

Details Helmholtz instability in stratified shear flows with magnetic fields Helmholtz instability in stratified shear flows with magnetic fields

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..95..277n&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 95, no. 2, Sept. 1983, p. 277-282.

Statistics

Computation

2

Boundary Value Problems, Kelvin-Helmholtz Instability, Magnetic Field Configurations, Shear Flow, Stratified Flow, Upper Atmosphere, Boussinesq Approximation, Computational Fluid Dynamics, Flow Velocity, Gravity Waves, Magnetohydrodynamic Waves, Velocity Distribution

Scientific paper

The stability characteristics of a Helmholtz velocity profile in a stratified Boussinesq fluid in the presence of a rigid boundary is studied. A jump in the magnetic field is introduced at a level different from the velocity discontinuity. New unstable modes in addition to the Kelvin-Helmholtz mode are found. The wavelengths of these unstable modes are close to the wavelengths of internal Alfvén gravity waves in the atmosphere.

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